I researched all I could about the vaccines and found the scare mongering was all bollocks - both my lads got all their vaccinations, other than a rash on a knee, both kids were fine and are doing great.
Sadly, like you are all saying, too many people believe any old lies, don't fact check and put their kids at risk.
I'm one of the last generations that never got the MMR as kids because it just wasn't freely available. The girls got rubella jabs but nowt for the boys. I got both Mumps and Rubella (or German Measles as we called it then), quite a few people at my school got it and fortunately no-one had any complications or long term effects that I know of. It was fucking horrible for a week or two though, I still remember how dreadful I felt.
That leads some people to think "well I got it, and it never did me any harm", and dismiss it as if it's no different to the common cold. They believe that their personal experience of it, as a relatively healthy child, is more relevant than a medical professional's understanding. They've never seen anyone suffer badly from it, therefore it's grossly exaggerated.
Why they then believe the stories of "vaccine damage" when they've never witnessed it, I don't know. Although I suspect it maybe an excuse and what it really is is part laziness, part the fact people just don't like going to the docs, and a large bit of not relishing the experience of having someone stick needles in their little one. I work in the pharmaceutical industry, I know the importance of getting kids and people vaccinated. Yet even though I know that I still had a twinge of guilt as both my girls screwed their innocent and trusting little faces up and started crying after they'd been jabbed. It makes you feel very crappy for a little while. Rather that though, than a week of them having a neck like a balloon, unable to swallow and feeling like shite for 10 days, and who knows what else, when they're a bit older and knowing I could have done something to prevent it.
"I don't want my kid to get autism, you hear these stories" is probably a front for "I can't handle seeing my little angel getting upset."